// 自定义指令相关


import Vue from 'vue'
import store from "@/store/index";

function checkPermission(permission, routeCode) {
  let buttons = store.getters["permission/getButtons"](routeCode)
  let isExist = false
  for (let index in buttons) {
    if (buttons[index].permission == permission) {
      isExist = true
      break;
    }
  }
  return isExist
}

Vue.directive('permission', {
  inserted: function (el, binding,vNode) {
    let permission = binding.value
    let routeCode = store.getters["permission/activeRouteCode"]
    // 也可以用以下方法获取...
    // routeCode = vNode.context.$route.meta.code
    if(!checkPermission(permission, routeCode)){
      el.parentNode && el.parentNode.removeChild(el)
      // el.style.display = 'none';
    }
  },
  update: function (el, binding) {
    // console.log('update',binding.expression)
// let permission = binding.value
    // let routeCode = store.getters["permission/activeRouteCode"]
    // // Message.info(permission+'----'+routeCode)
    // if(!checkPermission(permission, routeCode))
    //   el.style.display = 'none';
  },
  unbind: function () {
  }
})

// v-dialogDrag: 弹窗拖拽属性
Vue.directive('dialogDrag', {
  bind(el, binding, vnode, oldVnode) {
    const dialogHeaderEl = el.querySelector('.el-dialog__header');
    const dragDom = el.querySelector('.el-dialog');
    dialogHeaderEl.style.cssText += ';cursor:move;'
    dragDom.style.top = '0px'
    dragDom.style.left = '0px';
    dragDom.style.marginLeft = 'auto';

    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = (function () {
      if (window.document.currentStyle) {
        return (dom, attr) => dom.currentStyle[attr];
      } else {
        return (dom, attr) => getComputedStyle(dom, false)[attr];
      }
    })()
    dialogHeaderEl.onmousedown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft;
      const disY = e.clientY - dialogHeaderEl.offsetTop;

      const screenWidth = document.body.clientWidth; // body当前宽度
      const screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)

      const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
      const dragDomheight = dragDom.offsetHeight; // 对话框高度

      const minDragDomLeft = dragDom.offsetLeft;
      const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;

      const minDragDomTop = dragDom.offsetTop;
      const maxDragDomTop = screenHeight - dragDom.offsetTop;

      // 获取到的值带px 正则匹配替换
      let styL = sty(dragDom, 'left');
      let styT = sty(dragDom, 'top');

      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
      if (styL.includes('%')) {
        styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100);
        styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100);
      } else {
        styL = +styL.replace(/\px/g, '');
        styT = +styT.replace(/\px/g, '');
      };
      document.onmousemove = function (e) {
        // 通过事件委托，计算移动的距离
        let left = e.clientX - disX;
        let top = e.clientY - disY;

        // 边界处理
        if (-(left) > minDragDomLeft) {
          left = -(minDragDomLeft);
        } else if (left > maxDragDomLeft) {
          left = maxDragDomLeft;
        }

        if (-(top) > minDragDomTop) {
          top = -(minDragDomTop);
        } else if (top > maxDragDomTop) {
          top = maxDragDomTop;
        }
        // 移动当前元素
        dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
      };
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    }
  }
})

// 默认焦点
Vue.directive('focus', {
  inserted: function (el,binding,vnode,oldVnode) {
    el.focus()
  }
})
